Wow, this is an excellent level! The best I've played in a while
It gives you that feeling of "not exploring everything" which is great, because the world feels quite open-ended which helps with the immersion. Speaking of the immersion, the story was really well done. A simple story, but very well executed. I really felt as if I was chasing a bird.
The tilesets and CO's look amazing, I especially like the grass and the vines or whatever they are that are hanging from the ceiling.
Don't worry about the level being easy, a lot of people around here appreciate easy levels (me included
)
Two things I wanted to point out (attached some screenshots)
1) This invisible wall didn't seem to serve a purpose (unless you're planning a sequel?)
2) It felt weird that these things were solid, since they look like the belong in the background.
But those were only tiny things, great job